The StopTech Disc Brake Rotor - 12634150SL is a high-performance brake rotor designed for use in vehicles. It is made of high-quality materials and features a slotted design for improved heat dissipation and better braking performance. The rotor has a diameter of 126mm and is compatible with various makes and models of cars. It is designed to provide reliable and consistent braking power, even under extreme conditions. This brake rotor is a direct replacement for the original equipment rotor and is easy to install. It is a durable and long-lasting option for improving the braking performance of your vehicle.